<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
    <style>
      textarea {
        width: 300px;
        height: 100px;
        border: 1px solid #ccc;
      }
    </style>
  </head>

  <body>
    <textarea name="" id="message"></textarea> <button>提交</button>
    <div></div>
    <script>
      // 替换 replace
      // var str = 'andy和red';
      // // var newStr = str.replace('andy', 'baby');
      // var newStr = str.replace(/andy/, 'baby');
      // console.log(newStr);

      var text = document.querySelector('textarea')
      var btn = document.querySelector('button')
      var div = document.querySelector('div')
      btn.onclick = function () {
        div.innerHTML = text.value.replace(/激情|gay/g, '**')
      }
    </script>
  </body>
</html>
